| /* |
| * Copyright (c) 2016 Open-RnD Sp. z o.o. |
| * Copyright (c) 2017 RnDity Sp. z o.o. |
| * Copyright (c) 2019 Linaro Limited |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| /** |
| * @brief Driver for External interrupt/event controller in STM32 MCUs |
| * |
| * Driver is currently implemented to support following EXTI lines |
| * STM32F1/STM32F3: Lines 0 to 15. Lines > 15 not supported |
| * STM32F0/STM32L0/STM32L4: Lines 0 to 15. Lines > 15 are not mapped on an IRQ |
| * STM32F2/STM32F4: Lines 0 to 15, 16, 17 18, 21 and 22. Others not supported |
| * STM32F7: Lines 0 to 15, 16, 17 18, 21, 22 and 23. Others not supported |
| * |
| */ |
| #include <device.h> |
| #include <soc.h> |
| #include <misc/__assert.h> |
| #include "exti_stm32.h" |
| |
| #if defined(CONFIG_SOC_SERIES_STM32F0X) |
| #define EXTI_LINES 32 |
| #elif defined(CONFIG_SOC_SERIES_STM32F1X) |
| #define EXTI_LINES 19 |
| #elif defined(CONFIG_SOC_SERIES_STM32F2X) |
| #define EXTI_LINES 23 |
| #elif defined(CONFIG_SOC_STM32F302X8) |
| #define EXTI_LINES 36 |
| #elif defined(CONFIG_SOC_STM32F303XC) |
| #define EXTI_LINES 36 |
| #elif defined(CONFIG_SOC_STM32F334X8) |
| #define EXTI_LINES 36 |
| #elif defined(CONFIG_SOC_STM32F373XC) |
| #define EXTI_LINES 29 |
| #elif defined(CONFIG_SOC_SERIES_STM32F4X) |
| #define EXTI_LINES 23 |
| #elif defined(CONFIG_SOC_SERIES_STM32F7X) |
| #define EXTI_LINES 24 |
| #elif defined(CONFIG_SOC_SERIES_STM32L0X) |
| #define EXTI_LINES 30 |
| #elif defined(CONFIG_SOC_SERIES_STM32L4X) |
| #define EXTI_LINES 40 |
| #endif |
| |
| /* wrapper for user callback */ |
| struct __exti_cb { |
| stm32_exti_callback_t cb; |
| void *data; |
| }; |
| |
| /* driver data */ |
| struct stm32_exti_data { |
| /* per-line callbacks */ |
| struct __exti_cb cb[EXTI_LINES]; |
| }; |
| |
| int stm32_exti_enable(int line) |
| { |
| int irqnum = 0; |
| |
| if (line < 32) { |
| LL_EXTI_EnableIT_0_31(1 << line); |
| } else { |
| #if EXTI_LINES > 32 |
| LL_EXTI_EnableIT_32_63(1 << (line - 32)); |
| #else |
| __ASSERT_NO_MSG(line); |
| #endif |
| } |
| |
| #if defined(CONFIG_SOC_SERIES_STM32F0X) || \ |
| defined(CONFIG_SOC_SERIES_STM32L0X) |
| if (line >= 4 && line <= 15) { |
| irqnum = EXTI4_15_IRQn; |
| } else if (line >= 2 && line <= 3) { |
| irqnum = EXTI2_3_IRQn; |
| } else if (line >= 0 && line <= 1) { |
| irqnum = EXTI0_1_IRQn; |
| } else { |
| /* > 15 are not mapped on an IRQ */ |
| /* |
| * On STM32F0X, this function also support enabling EXTI |
| * lines that are not connected to an IRQ. This might be used |
| * by other drivers or boards, to allow the device wakeup on |
| * some non-GPIO signals. |
| */ |
| return 0; |
| } |
| #elif defined(CONFIG_SOC_SERIES_STM32F1X) || \ |
| defined(CONFIG_SOC_SERIES_STM32F2X) || \ |
| defined(CONFIG_SOC_SERIES_STM32F3X) || \ |
| defined(CONFIG_SOC_SERIES_STM32F4X) || \ |
| defined(CONFIG_SOC_SERIES_STM32F7X) || \ |
| defined(CONFIG_SOC_SERIES_STM32L4X) |
| if (line >= 5 && line <= 9) { |
| irqnum = EXTI9_5_IRQn; |
| } else if (line >= 10 && line <= 15) { |
| irqnum = EXTI15_10_IRQn; |
| } else if (line >= 0 && line <= 4) { |
| /* pins 0..4 are mapped to EXTI0.. EXTI4 */ |
| irqnum = EXTI0_IRQn + line; |
| } else { |
| switch (line) { |
| #if defined(CONFIG_SOC_SERIES_STM32F2X) || \ |
| defined(CONFIG_SOC_SERIES_STM32F4X) || \ |
| defined(CONFIG_SOC_SERIES_STM32F7X) |
| case 16: |
| irqnum = PVD_IRQn; |
| break; |
| case 18: |
| irqnum = OTG_FS_WKUP_IRQn; |
| break; |
| case 21: |
| irqnum = TAMP_STAMP_IRQn; |
| break; |
| case 22: |
| irqnum = RTC_WKUP_IRQn; |
| break; |
| #endif |
| #if defined(CONFIG_SOC_SERIES_STM32F7X) |
| case 23: |
| irqnum = LPTIM1_IRQn; |
| break; |
| #endif |
| default: |
| /* No IRQ associated to this line */ |
| #if defined(CONFIG_SOC_SERIES_STM32L4X) |
| /* > 15 are not mapped on an IRQ */ |
| /* |
| * On STM32L4X, this function also support enabling EXTI |
| * lines that are not connected to an IRQ. This might be used |
| * by other drivers or boards, to allow the device wakeup on |
| * some non-GPIO signals. |
| */ |
| return 0; |
| #else |
| return -ENOTSUP; |
| #endif /* CONFIG_SOC_SERIES_STM32L4X */ |
| } |
| } |
| #else |
| #error "Unknown STM32 SoC" |
| #endif |
| |
| irq_enable(irqnum); |
| |
| return 0; |
| } |
| |
| void stm32_exti_disable(int line) |
| { |
| if (line < 32) { |
| LL_EXTI_DisableIT_0_31(1 << line); |
| } else { |
| #if EXTI_LINES > 32 |
| LL_EXTI_DisableIT_32_63(1 << (line - 32)); |
| #else |
| __ASSERT_NO_MSG(line); |
| #endif |
| } |
| } |
| |
| /** |
| * @brief check if interrupt is pending |
| * |
| * @param line line number |
| */ |
| static inline int stm32_exti_is_pending(int line) |
| { |
| if (line < 32) { |
| return LL_EXTI_IsActiveFlag_0_31(1 << line); |
| } else { |
| #if EXTI_LINES > 32 |
| return LL_EXTI_IsActiveFlag_32_63(1 << (line - 32)); |
| #else |
| __ASSERT_NO_MSG(line); |
| return 0; |
| #endif |
| } |
| } |
| |
| /** |
| * @brief clear pending interrupt bit |
| * |
| * @param line line number |
| */ |
| static inline void stm32_exti_clear_pending(int line) |
| { |
| if (line < 32) { |
| LL_EXTI_ClearFlag_0_31(1 << line); |
| } else { |
| #if EXTI_LINES > 32 |
| LL_EXTI_ClearFlag_32_63(1 << (line - 32)); |
| #else |
| __ASSERT_NO_MSG(line); |
| #endif |
| } |
| } |
| |
| void stm32_exti_trigger(int line, int trigger) |
| { |
| if (trigger & STM32_EXTI_TRIG_RISING) { |
| if (line < 32) { |
| LL_EXTI_EnableRisingTrig_0_31(1 << line); |
| } else { |
| #if EXTI_LINES > 32 |
| LL_EXTI_EnableRisingTrig_32_63(1 << (line - 32)); |
| #else |
| __ASSERT_NO_MSG(line); |
| #endif |
| } |
| } |
| |
| if (trigger & STM32_EXTI_TRIG_FALLING) { |
| if (line < 32) { |
| LL_EXTI_EnableFallingTrig_0_31(1 << line); |
| } else { |
| #if EXTI_LINES > 32 |
| LL_EXTI_EnableFallingTrig_32_63(1 << (line - 32)); |
| #else |
| __ASSERT_NO_MSG(line); |
| #endif |
| } |
| } |
| } |
| |
| /** |
| * @brief EXTI ISR handler |
| * |
| * Check EXTI lines in range @min @max for pending interrupts |
| * |
| * @param arg isr argument |
| * @param min low end of EXTI# range |
| * @param max low end of EXTI# range |
| */ |
| static void __stm32_exti_isr(int min, int max, void *arg) |
| { |
| struct device *dev = arg; |
| struct stm32_exti_data *data = dev->driver_data; |
| int line; |
| |
| /* see which bits are set */ |
| for (line = min; line < max; line++) { |
| /* check if interrupt is pending */ |
| if (stm32_exti_is_pending(line)) { |
| /* clear pending interrupt */ |
| stm32_exti_clear_pending(line); |
| |
| /* run callback only if one is registered */ |
| if (!data->cb[line].cb) { |
| continue; |
| } |
| |
| data->cb[line].cb(line, data->cb[line].data); |
| } |
| } |
| } |
| |
| #if defined(CONFIG_SOC_SERIES_STM32F0X) || defined(CONFIG_SOC_SERIES_STM32L0X) |
| static inline void __stm32_exti_isr_0_1(void *arg) |
| { |
| __stm32_exti_isr(0, 2, arg); |
| } |
| |
| static inline void __stm32_exti_isr_2_3(void *arg) |
| { |
| __stm32_exti_isr(2, 4, arg); |
| } |
| |
| static inline void __stm32_exti_isr_4_15(void *arg) |
| { |
| __stm32_exti_isr(4, 16, arg); |
| } |
| |
| #else |
| static inline void __stm32_exti_isr_0(void *arg) |
| { |
| __stm32_exti_isr(0, 1, arg); |
| } |
| |
| static inline void __stm32_exti_isr_1(void *arg) |
| { |
| __stm32_exti_isr(1, 2, arg); |
| } |
| |
| static inline void __stm32_exti_isr_2(void *arg) |
| { |
| __stm32_exti_isr(2, 3, arg); |
| } |
| |
| static inline void __stm32_exti_isr_3(void *arg) |
| { |
| __stm32_exti_isr(3, 4, arg); |
| } |
| |
| static inline void __stm32_exti_isr_4(void *arg) |
| { |
| __stm32_exti_isr(4, 5, arg); |
| } |
| |
| static inline void __stm32_exti_isr_9_5(void *arg) |
| { |
| __stm32_exti_isr(5, 10, arg); |
| } |
| |
| static inline void __stm32_exti_isr_15_10(void *arg) |
| { |
| __stm32_exti_isr(10, 16, arg); |
| } |
| |
| #if defined(CONFIG_SOC_SERIES_STM32F4X) || \ |
| defined(CONFIG_SOC_SERIES_STM32F7X) || \ |
| defined(CONFIG_SOC_SERIES_STM32F2X) |
| static inline void __stm32_exti_isr_16(void *arg) |
| { |
| __stm32_exti_isr(16, 17, arg); |
| } |
| |
| static inline void __stm32_exti_isr_18(void *arg) |
| { |
| __stm32_exti_isr(18, 19, arg); |
| } |
| |
| static inline void __stm32_exti_isr_21(void *arg) |
| { |
| __stm32_exti_isr(21, 22, arg); |
| } |
| |
| static inline void __stm32_exti_isr_22(void *arg) |
| { |
| __stm32_exti_isr(22, 23, arg); |
| } |
| #endif |
| #ifdef CONFIG_SOC_SERIES_STM32F7X |
| static inline void __stm32_exti_isr_23(void *arg) |
| { |
| __stm32_exti_isr(23, 24, arg); |
| } |
| #endif /* CONFIG_SOC_SERIES_STM32F7X */ |
| #endif /* CONFIG_SOC_SERIES_STM32F0X */ |
| |
| static void __stm32_exti_connect_irqs(struct device *dev); |
| |
| /** |
| * @brief initialize EXTI device driver |
| */ |
| static int stm32_exti_init(struct device *dev) |
| { |
| __stm32_exti_connect_irqs(dev); |
| |
| return 0; |
| } |
| |
| static struct stm32_exti_data exti_data; |
| DEVICE_INIT(exti_stm32, STM32_EXTI_NAME, stm32_exti_init, |
| &exti_data, NULL, |
| PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE); |
| |
| /** |
| * @brief set & unset for the interrupt callbacks |
| */ |
| int stm32_exti_set_callback(int line, int port, stm32_exti_callback_t cb, |
| void *arg) |
| { |
| struct device *dev = DEVICE_GET(exti_stm32); |
| struct stm32_exti_data *data = dev->driver_data; |
| |
| if (data->cb[line].cb) { |
| return -EBUSY; |
| } |
| |
| data->cb[line].cb = cb; |
| data->cb[line].data = arg; |
| |
| return 0; |
| } |
| |
| void stm32_exti_unset_callback(int line) |
| { |
| struct device *dev = DEVICE_GET(exti_stm32); |
| struct stm32_exti_data *data = dev->driver_data; |
| |
| data->cb[line].cb = NULL; |
| data->cb[line].data = NULL; |
| } |
| |
| /** |
| * @brief connect all interrupts |
| */ |
| static void __stm32_exti_connect_irqs(struct device *dev) |
| { |
| ARG_UNUSED(dev); |
| |
| #if defined(CONFIG_SOC_SERIES_STM32F0X) || \ |
| defined(CONFIG_SOC_SERIES_STM32L0X) |
| IRQ_CONNECT(EXTI0_1_IRQn, |
| CONFIG_EXTI_STM32_EXTI1_0_IRQ_PRI, |
| __stm32_exti_isr_0_1, DEVICE_GET(exti_stm32), |
| 0); |
| IRQ_CONNECT(EXTI2_3_IRQn, |
| CONFIG_EXTI_STM32_EXTI3_2_IRQ_PRI, |
| __stm32_exti_isr_2_3, DEVICE_GET(exti_stm32), |
| 0); |
| IRQ_CONNECT(EXTI4_15_IRQn, |
| CONFIG_EXTI_STM32_EXTI15_4_IRQ_PRI, |
| __stm32_exti_isr_4_15, DEVICE_GET(exti_stm32), |
| 0); |
| #elif defined(CONFIG_SOC_SERIES_STM32F1X) || \ |
| defined(CONFIG_SOC_SERIES_STM32F2X) || \ |
| defined(CONFIG_SOC_SERIES_STM32F3X) || \ |
| defined(CONFIG_SOC_SERIES_STM32F4X) || \ |
| defined(CONFIG_SOC_SERIES_STM32F7X) || \ |
| defined(CONFIG_SOC_SERIES_STM32L4X) |
| IRQ_CONNECT(EXTI0_IRQn, |
| CONFIG_EXTI_STM32_EXTI0_IRQ_PRI, |
| __stm32_exti_isr_0, DEVICE_GET(exti_stm32), |
| 0); |
| IRQ_CONNECT(EXTI1_IRQn, |
| CONFIG_EXTI_STM32_EXTI1_IRQ_PRI, |
| __stm32_exti_isr_1, DEVICE_GET(exti_stm32), |
| 0); |
| #ifdef CONFIG_SOC_SERIES_STM32F3X |
| IRQ_CONNECT(EXTI2_TSC_IRQn, |
| CONFIG_EXTI_STM32_EXTI2_IRQ_PRI, |
| __stm32_exti_isr_2, DEVICE_GET(exti_stm32), |
| 0); |
| #else |
| IRQ_CONNECT(EXTI2_IRQn, |
| CONFIG_EXTI_STM32_EXTI2_IRQ_PRI, |
| __stm32_exti_isr_2, DEVICE_GET(exti_stm32), |
| 0); |
| #endif /* CONFIG_SOC_SERIES_STM32F3X */ |
| IRQ_CONNECT(EXTI3_IRQn, |
| CONFIG_EXTI_STM32_EXTI3_IRQ_PRI, |
| __stm32_exti_isr_3, DEVICE_GET(exti_stm32), |
| 0); |
| IRQ_CONNECT(EXTI4_IRQn, |
| CONFIG_EXTI_STM32_EXTI4_IRQ_PRI, |
| __stm32_exti_isr_4, DEVICE_GET(exti_stm32), |
| 0); |
| IRQ_CONNECT(EXTI9_5_IRQn, |
| CONFIG_EXTI_STM32_EXTI9_5_IRQ_PRI, |
| __stm32_exti_isr_9_5, DEVICE_GET(exti_stm32), |
| 0); |
| IRQ_CONNECT(EXTI15_10_IRQn, |
| CONFIG_EXTI_STM32_EXTI15_10_IRQ_PRI, |
| __stm32_exti_isr_15_10, DEVICE_GET(exti_stm32), |
| 0); |
| #if defined(CONFIG_SOC_SERIES_STM32F2X) || \ |
| defined(CONFIG_SOC_SERIES_STM32F4X) || \ |
| defined(CONFIG_SOC_SERIES_STM32F7X) |
| IRQ_CONNECT(PVD_IRQn, |
| CONFIG_EXTI_STM32_PVD_IRQ_PRI, |
| __stm32_exti_isr_16, DEVICE_GET(exti_stm32), |
| 0); |
| IRQ_CONNECT(OTG_FS_WKUP_IRQn, |
| CONFIG_EXTI_STM32_OTG_FS_WKUP_IRQ_PRI, |
| __stm32_exti_isr_18, DEVICE_GET(exti_stm32), |
| 0); |
| IRQ_CONNECT(TAMP_STAMP_IRQn, |
| CONFIG_EXTI_STM32_TAMP_STAMP_IRQ_PRI, |
| __stm32_exti_isr_21, DEVICE_GET(exti_stm32), |
| 0); |
| IRQ_CONNECT(RTC_WKUP_IRQn, |
| CONFIG_EXTI_STM32_RTC_WKUP_IRQ_PRI, |
| __stm32_exti_isr_22, DEVICE_GET(exti_stm32), |
| 0); |
| #endif |
| #if CONFIG_SOC_SERIES_STM32F7X |
| IRQ_CONNECT(LPTIM1_IRQn, |
| CONFIG_EXTI_STM32_LPTIM1_IRQ_PRI, |
| __stm32_exti_isr_23, DEVICE_GET(exti_stm32), |
| 0); |
| #endif /* CONFIG_SOC_SERIES_STM32F7X */ |
| #endif |
| } |